SKIN INJURY (CUTS, SCRAPES, BRUISES) Injury Definition Cuts and Scratches: Superficial cuts (scratches) only extend partially through the skin and rarely become infected.  Deep cuts (lacerations) go through the skin (dermis). Abrasions or Scrapes: An area of superficial skin that has been scraped off. Commonly occurs on the knees, elbows and palms. Bruises: Bruises (contusions) result from a direct blow or a crushing injury; there is bleeding into the skin from damaged blood vessels without an overlying cut or abrasion. When are Stitches Needed? Any cut that is split open or gaping probably needs sutures (stitches). Cuts longer than 1/2 inch (12 mm) usually need sutures. On the face, cuts longer than ¼ inch (6 mm) usually need sutures. A physician should evaluate any open wound that may need sutures regardless of the time that has passed since the initial injury. Tetanus Booster Tetanus is a rare infection caused by bacteria that are found in many places, especially in dirt and soil. The tetanus bacteria enter through a break in the skin and then spread through the body. Tetanus is commonly called "lock jaw" because the first symptom is a tightening of the muscles of the face.  However, the final stage of the infection is much more serious. All of the muscles of the body go into severe spasm, including the muscles that control breathing.  Eventually a person with a tetanus infection loses the ability to breath, and may die in spite of intensive treatment in the hospital. A tetanus booster protects you from getting a tetanus infection.  It does not prevent other kinds of wound infection. Clean Cuts and Scrapes - Booster Needed Every 10 Years: Patients with clean MINOR wounds AND who have previously had 3 or more tetanus shots (full series), need a booster every 10 years. Examples of minor wounds include a superficial abrasion or a cut sustained while washing dishes. Obtain booster within 72 hours. Dirty Cuts and Scrapes - Booster Needed Every 5 Years: Patients with dirty wounds need a booster every 5 years. Examples of dirty wounds include those contaminated with soil, feces, saliva and more serious wounds from deep punctures, crushing, and burns. Obtain booster within 24. When in doubt? assume that it is a dirty wound. See More Appropriate Topic (instead of this one) If Animal caused it, see ANIMAL BITE It looks infected, see WOUND INFECTION Skin is punctured (not cut or scraped), see PUNCTURE WOUND BURNS SPLINTER OR SLIVER is present in the skin WHEN TO CALL YOUR DOCTOR FOR SKIN INJURY Call 911 Now (you may need an ambulance) If Major bleeding (actively bleeding or spurting) that can't be stopped Cut on the neck, chest, back, or abdomen that may go deep (e.g. stab wound) First Aid: Apply direct pressure to the entire wound with a clean cloth. Call Your Doctor Now (night or day) If You think you have a serious injury Severe pain Bleeding that hasn't stopped after 10 minutes of direct pressure Cut is very deep (e.g. can see bone or tendons) Skin is split open or gaping and may need stitches Dirt or grime in the wound is not removed after 15 minutes of scrubbing Skin loss from bad scrape goes very deep Skin loss involves greater than 10% of body surface (Note: the hand's surface equals 1%) High pressure injection injury (e.g. from paint gun, usually work-related) Cut or scrape looks infected (redness, red streak or pus) Call Your Doctor Within 24 Hours (between 9 am and 4 pm) If: You think you need to be seen Several bruises occur without any known injury Very large bruise follows a minor injury (wider than 2 inches) No tetanus booster in more than 10 years (5 years for dirty cuts and scrapes) Diabetic with any cut or scrape on foot Call Your Doctor During Weekday Office Hours If You have other questions or concerns Self Care at Home If Minor cut, scrape or bruise and you don't think you need to be seen Back to Top HOME CARE ADVICE FOR MINOR CUT, SCRAPE, OR BRUISE Treatment of Minor Cuts, Scratches and Scrapes (abrasions): Apply direct pressure for 10 minutes to stop any bleeding. Wash the wound with soap and water for 5 minutes. For any dirt, scrub it gently with a washcloth. Cut off any pieces of dead loose skin using a fine scissors (cleaned with rubbing alcohol before and after use). Apply an antibiotic ointment, covered by a Band-Aid or dressing.  Change daily. Another option is to use a Liquid Skin Bandage that only needs to be applied once. Avoid ointments with this. Treatment of Minor Bruise: Apply a cold pack or an ice bag wrapped in a towel for 20 minutes each hour for 4 consecutive hours.  (20 minutes of cold followed by 40 minutes of rest for 4 hours in a row). 48 hours after the injury, use local heat for 10 minutes 3 times each day to help reabsorb the blood. Rest the injured part as much as possible for 48 hours. Pain Medication: For pain relief, take acetaminophen every 4-6 hours (e.g. Tylenol; adult dosage 650 mg) OR ibuprofen every 6-8 hours (e.g. Advil, Motrin; adult dosage 400 mg). Do not take ibuprofen if you have stomach problems, kidney disease, are pregnant, or have been told by your doctor to avoid this type of anti-inflammatory drug. Do not take ibuprofen for more than 7 days without consulting your doctor. Do not take acetaminophen if you have liver disease. Read the package instructions thoroughly on all medications that you take. Expected Course: Pain and swelling usually begin to improve 2 or 3 days after an injury. Swelling is usually gone in 7 days. Pain may take 2 weeks to completely resolve. Call Your Doctor If: Looks infected (pus, redness, increasing tenderness) Doesn't heal within 10 days You become worse or develop any of the "Call Your Doctor" symptoms. Back to Top Disclaimer: This information is not intended be a substitute for professional medical advice. It is provided for educational purposes only. You assume full responsibility for how you choose to use this information. Adult HouseCalls Online. Copyright © 2000-2005 David Thompson, M.D. FACEP Reviewed 10/1/2005 Revised 10/17/2004 See Other Topics: Animal Bite Burns Puncture Wound Splinter or Sliver Wound Infection View Index of Topics